The relationship between the capacitance-hightened voltage and the power source voltage in the R-L-C series circuit has for analyzed after introducing the concept of capacitance -hightenet voltage.

By the method of random theory,the influence of resistance thermal flutuation on circuital current transient process in a RL series circuit is studied And the s table probability density in current,average current and current flctuation are calculated.

The author discussed the characteristics of series connection of multiple executive elements in a hydraulic system and presented a method for calculating parameters of two typical series circuits for which application examples were given. The author concluded that series circuit could simplify the hydraulic system, achieve synchronic movement of the executive elements and raise efficiency of the system.

This paper analyses NTC-themistor circuit in series/parallel, indicates that there exists a great comparability between the output voltage of series circuit and the equivalent themistor in parallel circuit then, it analyses the designed thermistor circuit in series/parallel by obtaining the characteristic or using formula, result shows that the circuit with a wider linear temperature area, high sensitivity, and clear physical characteristic. At last, it presents some design examples of this method.

Design principle of an LV switchboard was proposed. An L C series circuit of resonance frequency 50Hz was connected to power supply line of a large size three phase motor. The L C series circuit helps to reduce starting current of the machine and to achieve automatically limit current starting.

This paper analyses NTC-themistor circuit in series/parallel, indicates that there exists a great comparability between the output voltage of series circuit and the equivalent themistor in parallel circuit then, it analyses the designed thermistor circuit in series/parallel by obtaining the characteristic or using formula, result shows that the circuit with a wider linear temperature area, high sensitivity, and clear physical characteristic. At last, it presents some design examples of this method.

Magnetic shunting of a series circuit in an induction electricity meter

The phase of the HeLa cell impedance is characteristic of a series circuit when the operation voltage exceeds 0.8?V because the cell impedance becomes significant.

Below an operating voltage of 0.9?V, the system impedance response is characteristic of a parallel circuit at under 30?kHz and of a series circuit at between 30 and 100?kHz.

The electric direct current was passed in vertical direction parallel with the axis of cylindrical mould or through the series circuit steel-powder nickel layer-hard alloy.

The current through each element of the series circuit must be the same.

High-frequency titration curves are discussed for various methods of experimental determination (the Q-meter, Z-meter and F-meter methods), using equivalent circuits for C-type and L-type titrating cells. It has been found that for the cases of L-type cell with Q-determination and C-type cell with Z- or F-determination, the quantity measured in the course of titration changes monotonously with .the increase of conductivity of the solution. In these cases, the high-frequency titration curve should be similar...

High-frequency titration curves are discussed for various methods of experimental determination (the Q-meter, Z-meter and F-meter methods), using equivalent circuits for C-type and L-type titrating cells. It has been found that for the cases of L-type cell with Q-determination and C-type cell with Z- or F-determination, the quantity measured in the course of titration changes monotonously with .the increase of conductivity of the solution. In these cases, the high-frequency titration curve should be similar in shape to that obtained in an ordinary conductometric titration. Two mistakes appearing in literature are here pointed out. (1) The equivalent parellel circuit and the equivalent series circuit for the C-type titrating cell do give the identical result for the value of the conductance of the solution which gives the maximum loss of high-frequency energy in the cell. (2) The appearance of a maximum high-frequency loss with increasing conduc- tance of the solution in the C-type cell is not the result of the Debye-Falkenhagen effect. The use of Pt wire electrodes in direct contact with solution for high-frequency titration is suggested. Satisfactory titration curves have been obtained with wire electrodes and a series capacitor to act as a C-type cell with much less shielding troubles.

Objective.An attempt has been made to demonstrate the derivation of convolution integral on oscillograph.For this reason,this paper provides a theoretic basis upon which convolution can be displayed.In this respect,the crucial point is using an impulse function as a substitute for shock excitation function.Criteria for this substitution are discussed in detail.Expanding the exponential functioninto power series and omitting the high order terms,the two criteria for substituting the shock excitation function...

Objective.An attempt has been made to demonstrate the derivation of convolution integral on oscillograph.For this reason,this paper provides a theoretic basis upon which convolution can be displayed.In this respect,the crucial point is using an impulse function as a substitute for shock excitation function.Criteria for this substitution are discussed in detail.Expanding the exponential functioninto power series and omitting the high order terms,the two criteria for substituting the shock excitation function by an impulse function are given as follows;Where U0 and A are the amplitude and pulse duration of the common square-wave pulse adding to a RC series circuit respectively,T the duration constant(t=RC),ψ0 the intensity of shock excitation function or the area beneath ψ0δ(t),and ψ the area beneath the square-wave pulse or ψ=U0×Δ Using these criteria,the continuous excitation may then be discretized and thus the integral expression of a convolution is derived using the principle of superposition,taking the same form to the known but derived from different With such a derivation,the whole process as above can be demonstrated on an oscillograph.On screen,processes of both the superposition of discrete responses and the successive approximation are clearly displayed,as shown in Fig 7,8 and 9.Fig.1 Shock excitation function adding to a RC series circuitFig.2 Square-wave pulse voltage (a) and the responce on capacitor as adding it to a RC series circuit (b)Fig.3 Step response on a RC series circuit,(a)adding step voltage to the circuit (b)wave-form of step response.Fig.4 Step voltage (a) and pulse packet voltage (b)Fig.5 Response due to the K-th pulse voltage Fig.6 Demonstration set-up composed of impulser,RC circuit and oscillograph.Fig.7 Pulse packet voltage response as U's=20V,Δ'=10μs andf=3kHz.Fig.8 Pulse packet voltage response as U's=20V,Δ'=3μs and f=10kHz.Fig.9 Pulse packet voltage response as U*s=20V,Δ'=1μs and f=30kHz.

The measurement of parameters of ACEL panel are indispensable in the study of pattel mechanism, panel classification and optimizing operationeon -ditions. The author suggests the resonance method which is based ucon the principle of resonance in RLC series circuits.The resonance method is as follows. Putting the inductor and ACEL panel in series, supplying the circuit with voltage of certain frequency, and then changing its inductance and voltage to make the circuit resonant (inductive...

The measurement of parameters of ACEL panel are indispensable in the study of pattel mechanism, panel classification and optimizing operationeon -ditions. The author suggests the resonance method which is based ucon the principle of resonance in RLC series circuits.The resonance method is as follows. Putting the inductor and ACEL panel in series, supplying the circuit with voltage of certain frequency, and then changing its inductance and voltage to make the circuit resonant (inductive reactance (WWWWWWWWWWWWWL) in the circuit is just enough to offset the panel capa-citive reactance (1/WWWWWWWWWC)), the parameters of ACEL panel can be measured.They are:1. Power consumption (PEL);2. Equivalent capacitance (CBL);3. Equivalent series resistance (rBL);4. Equivalent parallel resistance (r'EL);5. Loss angle (8888888888). Experiments show that the resonance method is. sample and reliable.Besides , as the voltage across the panel is Q times the voltage of the power supply,an ordinary signal generator of audio frequency can be used.In practice, with the resonance principle, a high voltage panel can work with a lower voltage power supply.The power factor will be raised, the size of the power supply will be reduced and the cost will be cut down.